<div class="input-group mt-10">
  <input type="text" readonly class="form-control zindex_1" [value]="fileName">
  <div class="input-group-btn">
    <button type="button" class="btn btn-default dropdown-toggle mb-30" aria-haspopup="true" aria-expanded="false" (click)="openDialog()">
      <span class="caret"></span>
    </button>
  </div>
  <!-- /input-group -->
  <label class="upload-button">
    <input type="file" ngFileSelect accept="application/zip" (uploadOutput)="onUploadOutput($event)"  multiple="multiple"/> 
    <span class="btn btn-default" style="margin-bottom:25px"> file</span>
  </label>
</div>
